feat: refactor frontend and fix LLM extraction

- Fix critical await bug in extract-stream endpoint
- Add comprehensive logging to LLM and parser modules
- Implement fallback to standard completion for incompatible models
- Create enhanced v2.0 prompts with social media handling and few-shot examples
- Add LLM health check endpoint
- Decompose share page into 6 focused Svelte 5 snippets

Resolves LM Studio integration issues and improves code maintainability

secrets/auth.json

@@ -5,7 +5,7 @@
       "value": "SDRORLyWEsWWty2ZoVGdER",
       "domain": ".instagram.com",
       "path": "/",
-      "expires": 1800843039.107498,
+      "expires": 1800844170.041161,
       "httpOnly": false,
       "secure": true,
       "sameSite": "Lax"
@@ -45,7 +45,7 @@
       "value": "59661903731",
       "domain": ".instagram.com",
       "path": "/",
-      "expires": 1774059039.107614,
+      "expires": 1774060170.041253,
       "httpOnly": false,
       "secure": true,
       "sameSite": "None"
@@ -55,7 +55,7 @@
       "value": "1280x720",
       "domain": ".instagram.com",
       "path": "/",
-      "expires": 1766887840,
+      "expires": 1766888970,
       "httpOnly": false,
       "secure": true,
       "sameSite": "Lax"
@@ -72,7 +72,7 @@
     },
     {
       "name": "rur",
-      "value": "\"CLN\\05459661903731\\0541797819039:01fe28e2455d3332e6b17b2bc588f404f1f9056dfb4f1d9331c65ff70a8fbeff6d61e46d\"",
+      "value": "\"CLN\\05459661903731\\0541797820170:01fe4d06c032b2dd69a9371e780f6df9e7e3f17ddb2a68bcd030ca4ae9cbb7966e80fd2d\"",
       "domain": ".instagram.com",
       "path": "/",
       "expires": -1,
@@ -87,7 +87,7 @@
       "localStorage": [
         {
           "name": "chatd-deviceid",
-          "value": "71f934a8-57bf-4e57-84e5-1653d25861b8"
+          "value": "8e16ee41-8d6a-4ad5-a954-6f0f2f7e8658"
         },
         {
           "name": "hb_timestamp",
@@ -95,11 +95,11 @@
         },
         {
           "name": "IGSession",
-          "value": "6m2tlb:1766284840183"
+          "value": "6m2tlb:1766285970158"
         },
         {
           "name": "mutex_polaris_banzai",
-          "value": "64jcir:1766283041182"
+          "value": "63u12u:1766284171158"
         },
         {
           "name": "pixel_fire_ts",
@@ -111,7 +111,7 @@
         },
         {
           "name": "Session",
-          "value": "7e087y:1766283075183"
+          "value": "dcug3n:1766284205158"
         },
         {
           "name": "has_interop_upgraded",
@@ -119,7 +119,7 @@
         },
         {
           "name": "mutex_banzai",
-          "value": "64jcir:1766283041182"
+          "value": "63u12u:1766284171158"
         },
         {
           "name": "banzai:last_storage_flush",